class_docstr: Class for the Hitting Set Algorithm to obtain a approximate minimal set of backdoor variables
  to condition on for each node pair.
docstr: List of sets is covered by the variable set.
docstr_tok: ["List","of","sets","is","covered","by","the","variable","set","."]
code: def _is_covered(self, indices_covered, num_indices):
      """
      List of sets is covered by the variable set.
      """
  
      covered = [False for i in range(num_indices)]
      for idx in indices_covered:
          covered[idx] = True
      return all(covered)
  
imports: import networkx
  from dowhy.utils.graph_operations import adjacency_matrix_to_adjacency_list
label_desc: Use image node_id 8 for calling the HittingSetAlgorithm obj's underlying member method code with example usage: obj._is_covered(indices_covered, num_indices) and returns: all